netdev - Re: [PATCH v2 net] tcp: Fix integer-overflows in TCP vegas

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Message-ID: <20140729095227.GD5038@cpaasch-mac>
Date:	Tue, 29 Jul 2014 11:52:27 +0200
From:	Christoph Paasch <christoph.paasch@...ouvain.be>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, ncardwell@...gle.com,
	David.Laight@...LAB.COM, doug.leith@...m.ie
Subject: Re: [PATCH v2 net] tcp: Fix integer-overflows in TCP vegas

On 28/07/14 - 17:26:27, David Miller wrote:
> From: Christoph Paasch <christoph.paasch@...ouvain.be>
> Date: Fri, 25 Jul 2014 13:52:39 +0200
> 
> > +				target_cwnd = U32_MAX / rtt * upper + err / rtt;
> 
> Doing two divides is probably more expensive than using do_div().
> 
> Why don't we go back to the do_div() implementation, sorry about
> changing my mind again.

No worries :)
I will resubmit.


Cheers,
Christoph

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